About Required calendar dates
Calendar - Gregorian calendar (1900-2099).
Easter - Roman Catholic Church, Greek Catholic Church, Orthodox Church, Passover.
Ascension and Trinity - Roman Catholic Church, Greek Catholic Church, Orthodox Church.
Moon - phases in Greenwich. Phases - New moon, Waxing crescent, First quarter, Waxing gibbous,
Full moon, Waning gibbous, Last quarter, Waning crescent.
For phases Waxing crescent, Waxing gibbous, Waning gibbous and Waning crescent - not determined the exact %.
Zodiac - Western astrology (Tropical zodiac), Element, Ruling celestial body Classical, Brightest star, Period.
Chinese Calendar - Animal, Primary Element, Planet, Season, Side of the Light, Color, Beginning of the Year.